Watanabe, Hirotaka

写真a

Affiliation

School of Medicine, Department of Physiology (Shinanomachi)

Position

Project Senior Assistant Professor (Non-tenured)/Project Assistant Professor (Non-tenured)/Project Lecturer (Non-tenured)

Academic Degrees 【 Display / hide

  • 医学博士, The University of Tokyo, Dissertation, 2006.06

    BrmとBRG1の発現を共に欠失するヒト非小細胞肺がん細胞株における神経特異的遺伝子群の発現誘導とその機構

 

Research Areas 【 Display / hide

  • Neurochemistry/Neuropharmacology

Research Keywords 【 Display / hide

  • Alzheimer’s disease

  • synapse

Research Themes 【 Display / hide

  • Analysis of Alzheimer-related molecules in the synapse, 

    2017.04
    -
    2020.03

 

Papers 【 Display / hide

  • Pathological Progression Induced by the Frontotemporal Dementia-Associated R406W Tau Mutation in Patient-Derived iPSCs

    Nakamura M., Shiozawa S., Tsuboi D., Amano M., Watanabe H., Maeda S., Kimura T., Yoshimatsu S., Kisa F., Karch C., Miyasaka T., Takashima A., Sahara N., Hisanaga S., Ikeuchi T., Kaibuchi K., Okano H.

    Stem Cell Reports (Stem Cell Reports)  13 ( 4 ) 684 - 699 2019.10

    ISSN  22136711

     View Summary

    © 2019 The Author(s) Mutations in the microtubule-associated protein tau (MAPT) gene are known to cause familial frontotemporal dementia (FTD). The R406W tau mutation is a unique missense mutation whose patients have been reported to exhibit Alzheimer's disease (AD)-like phenotypes rather than the more typical FTD phenotypes. In this study, we established patient-derived induced pluripotent stem cell (iPSC) models to investigate the disease pathology induced by the R406W mutation. We generated iPSCs from patients and established isogenic lines using CRISPR/Cas9. The iPSCs were induced into cerebral organoids, which were dissociated into cortical neurons with high purity. In this neuronal culture, the mutant tau protein exhibited reduced phosphorylation levels and was increasingly fragmented by calpain. Furthermore, the mutant tau protein was mislocalized and the axons of the patient-derived neurons displayed morphological and functional abnormalities, which were rescued by microtubule stabilization. The findings of our study provide mechanistic insight into tau pathology and a potential for therapeutic intervention.

  • A combinational treatment of carotenoids decreases Aβ secretion in human neurons via β-secretase inhibition

    Sho M., Ichiyanagi N., Imaizumi K., Ishikawa M., Morimoto S., Watanabe H., Okano H.

    Neuroscience Research (Neuroscience Research)   2019

    ISSN  01680102

     View Summary

    © 2019 Alzheimer's disease (AD) is the most common cause of dementia and is characterized neuropathologically by the presence of amyloid plaques and neurofibrillary tangles. Amyloid-β (Aβ) peptides, major components of amyloid plaques and crucial pathogenic molecules in terms of the amyloid hypothesis, are derived from successive proteolytic processing of amyloid-β precursor protein (APP). In this study, we established a human neuronal culture system using induced pluripotent stem cells (iPSCs) to evaluate the possible effects of natural compounds on the amyloid phenotype. Unexpectedly, we found that combinational treatment of carotenoids, but not docosahexaenoic acid, significantly decreased Aβ secretion from iPSC-derived human cortical neurons. Importantly, the effects of the carotenoids resulted from specific inhibition of BACE1 activity and not from expression changes in APP or BACE1. Therefore, these results indicate a novel beneficial function of carotenoids in the anti-amyloidogenic processing of APP. Collectively, this study will shed light on neuronal protection by a novel mechanism during the pathogenesis of AD.

  • Reconsidering Animal Models of Major Depressive Disorder in the Elderly

    Toda, Shigenobu, Iguchi, Yoshio, Lin, Ziqiao, Nishikawa, Hiromi, Nagasawa, Tatsuya, Watanabe, Hirotaka, Minabe, Yoshio

    FRONTIERS IN AGING NEUROSCIENCE 8   10727 - 10735 2016.08

    Research paper (scientific journal),  ISSN  1663-4365

  • Presenilin-1 Knockin Mice Reveal Loss-of-Function Mechanism for Familial Alzheimer's Disease

    Xia, Dan, Watanabe, Hirotaka, Wu, Bei, Lee, Sang Hun, Li, Yan, Tsvetkov, Evgeny, Bolshakov, Vadim Y., Shen, Jie, Kelleher, Raymond J., III

    NEURON 85 ( 5 ) 967 - 981 2015.03

    Research paper (scientific journal),  ISSN  0896-6273

  • Partial Loss of Presenilin Impairs Age-Dependent Neuronal Survival in the Cerebral Cortex

    Watanabe, Hirotaka, Iqbal, Minah, Zheng, Jin, Wines-Samuelson, Mary, Shen, Jie

    JOURNAL OF NEUROSCIENCE 34 ( 48 ) 15912 - 15922 2014.11

    Research paper (scientific journal),  ISSN  0270-6474

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Papers, etc., Registered in KOARA 【 Display / hide

Research Projects of Competitive Funds, etc. 【 Display / hide

  • プレシナプスにおけるアルツハイマー病発症の分子機序解析

    2017.04
    -
    2020.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 渡部 博貴, Grant-in-Aid for Scientific Research (C), Principal Investigator

  • Development of neuron-specific analytical method to elucidate the mechanism underlying AD pathogenesis

    2015.08
    -
    2017.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 渡部 博貴, Grant-in-Aid for Research Activity Start-up , Principal Investigator

     View Summary

    In this research proposal, I aimed to isolate single neuron from entorhinal cortex layer 2/3 of adult mouse, which is most likely vulnerable neuronal population in Alzheimer’s disease patients. First, I dissected out entorhinal cortex layer 2/3 from mouse brain slice under stereoscopic microscope, followed by trypsin treatment. Next, I picked single neurons with micropipette, and cDNAs fom each single neuron were synthesized for RT-PCR analysis. Several marker genes specific for entorhinal cortex layer 2/3 can be successfully detected by semiquantitative RT-PCR.

Intellectual Property Rights, etc. 【 Display / hide

  • Novel Receptor Polypeptides and Polynucleotides Encoding the Same.

    Application No.: PCT/JP2003/003050  2003.03 

    Patent, Joint

  • A Novel Method for Constructing Gene-Targeting Vectors.

    Application No.: P2000-81795  2000.03 

    Patent, Joint

 

Courses Taught 【 Display / hide

  • PHYSIOLOGY 2

    2021

  • PHYSIOLOGY 2

    2020

  • PHYSIOLOGY 2

    2019

 

Memberships in Academic Societies 【 Display / hide

  • Society for Neuroscience, 

    2010.05
    -
    Present
  • The Japan Neuroscience Society, 

    2006.11
    -
    Present